Pin 11 is the DIFFSENSE signal. It will not be grounded on an SE cable. an SE cable should have it ganged with all the other grounds to make HVD shut down so as not to damage the negative side of the diff drivers, which go into grounds on the SE side, as well as not harming SE circuits with HVD signals Also on SE pins 1-11, 15-25 are all grounds. On the HVD, 1,26,14,39, 25 and 50 are all grounds. The rest should not be commoned to those signals. -------- Forwarded Message -------- Subject: SCSI Terminal Server question Date: Sat, 18 Apr 2015 15:48:50 -0400 (EDT) From: Cory Smelosky <b4 at gewt.net> Reply-To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> To: cctech at classiccmp.org Hey, I have a Digi STS 1032 SCSI terminal server here, thought I'd ask if anyone knows before I pull out the multimeter and fight with using a magnifier to count the pins and measure. 50-pin external SCSI, anyone know if this is an HVD SCSI device? -- Cory Smelosky http://gewt.net Personal stuff http://gimme-sympathy.org Projects